Product Details for CuNi3Si1Mg (C70250)
1. Core Specifications
| Item |
Details |
| Grade |
CuNi3Si1Mg (UNS C70250) |
| Standard |
ASTM B888, RoHS & ELV Compliant |
| Composition |
Cu (Balance), Ni 3%, Si 0.65%, Mg 0.15%, Pb <0.05% |
| Material Type |
Precipitation-Hardened High Copper Alloy |
2. Key Advantages
High Strength: Delve into remarkable tensile strength ranging between 620-900 MPa and yield strength from 450-750 MPa, adapting to various tempers with impressive resilience.
High Conductivity: Outstanding electrical conductivity charting between 25-34 MS/m, equivalent to 45-60% IACS, surpassing the usual bronze and brass standards with its superior performance.
Stress Relaxation Resistance: Retains more than 70% of its original stress even at elevated temperatures of up to 200°C, showcasing exceptional stability and endurance.
Formability: Unmatched cold workability with a minimum bending radius of just 2× thickness, facilitating intricate designs with ease and precision.
Eco-Certified: Proudly lead-free and compliant with both RoHS & ELV standards, embodying our commitment to eco-friendly manufacturing.
3. Typical Applications
| Industry |
Applications |
| Electronics |
High-density connectors, CPU sockets, relay springs, micro-switch contacts |
| Automotive |
Fuel injection components, sensor terminals, battery connectors |
| Industrial Equipment |
High-temperature springs, solenoid coils, precision instrument contacts |
| Renewable Energy |
PV junction boxes, EV charging port components |
4. Physical & Mechanical Properties
| Parameter |
Typical Value |
Test Standard |
| Density |
8.82 g/cm³ |
ISO 1183 |
| Thermal Conductivity |
190 W/(m·K) |
ASTM E1461 |
| Thermal Expansion (0-300°C) |
17.6×10-6/K |
ASTM E228 |
| Elastic Modulus |
131 GPa |
ASTM E111 |
| Hardness (HV) |
180-270 (depends on temper) |
ASTM E384 |
5. Processing & Heat Treatment
- Cold Working: Ideally suited for stamping and bending processes with a minimum bend radius of 2× thickness, ensuring consistent quality in production.
- Welding: TIG/MIG methods highly recommended for their excellent results, while soft soldering remains a good alternative.
- Heat Treatment:
- Soft Annealing: Conducted at 600-700°C for 1-3 hours to enhance ductility and workability.
- Hot Working: Conducted at temperatures between 800-950°C, enabling superior malleability and shaping.
6. Available Forms & Dimensions
| Form |
Size Range |
Custom Options |
| Strip |
Thickness: 0.1mm-5.0mm, Width: ≥3mm |
Hot-dip tinned, contour-milled, coatings |
| Sheet |
Thickness: 0.5mm-10mm |
Mechanical/electrolytic polishing |
| Wire |
Diameter: 0.5mm-20mm |
Precision cold-drawn/polished |
| Tube |
OD: 3mm-50mm, Wall: 0.2mm-5mm |
Seamless/welded customization |
7. Certifications & Support
- Certifications: Backed by ASTM B888, RoHS, and ELV certifications, with comprehensive Mill Certificates readily available for your peace of mind.
- Testing Reports: Includes detailed mechanical properties assessments, conductivity evaluations, and thorough metallurgical analyses.
- Customization: We offer non-standard sizes and specialized surface treatments like tin/silver plating to meet your bespoke requirements.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd.) is a prestigious branch of Huahong Group (A-STOCK: 002645.SZ), a renowned manufacturer of Copper Alloy products situated in eastern China, near Shanghai.
We specialize in the production of high-quality copper and copper alloy products, includingadmiralty brass, naval brass, aluminum brass, and cupronickel (copper nickel),offering an extensive range of products like condenser tubes, heat exchange tubes, large diameter copper nickel pipes, and forged flanges. Our oxygen-free copper products and railway ground cables contribute to an impressive annual production capacity exceeding 30,000 tons. These products serve a myriad of industries, including seawater desalination, nuclear power, petrochemicals, marine, steam turbines, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit.
Moreover, we have been instrumental in writing the National Standard for copper alloy seamless tubes/pipes utilized in Nuclear Powerprojects, setting benchmarks in quality and safety!
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